Marsupials are a very old form of mammal, evolving before placental mammals over 70 million years ago. Today Australian marsupials can be compared to placental mammals on other continents. It could be said that today's Australian marsupials and today's placental mammals have undergone heterozygote advantage undergone heterozygote advantage undergone divergent evolution undergone divergent evolution undergone selective advantage undergone selective advantage undergone artificial selection undergone artificial selection undergone convergent evolution

an organism's phenotype is the  form of a trait  that it  displays. for  flowercolor, a pea  plant  can  display  a phenotype of purple or white flowers. an organism's  genotype  is the alleles of a gene it contains. based on his data, mendel concluded that a phenotype can be  determined  by more than one  genotype.

linnaeus is the father of taxonomy, which is the system of classifying and naming organisms. one of his contributions was the development of a hierarchical system of classification of nature. today, this system includes eight taxa: domain, kingdom, phylum, class, order, family, genus, and species.